Tube finishing or straightening rolling mill



Feb. 10, 1931.

H. IDELV 1,791,869

TUBE FINISHING OR STRATYGHTE'NING ROLLING MILL Filed June 16, 1927 Inventor Patented Feb. 10, 1931 UNITED STATES PATENT OFFICE HERMANN IDEL, OF DUISBURG, GERMANY, ASSIGNOR TO DEMAG AKTIENGESELL- SCHAFT, OF DUISBURG, GERMANY TUBE FINISHING OR STRAIG-HI'ENING ROLLING MILL Application filed June 16,

the straightening or finishing machine; The

straightening of the tubes is effected by two rolls arranged at an inclination one to the other, in such manner that during the work ing operation the hyperbolically shaped and relatively long bodies of the rolls are rolled upon the periphery of the tube, and automatically move it through the inclined position. Any lateral deflection'of the tube is prevented by the two guide rules. In order that tubes of the most varied dimensions may be straightened with one and the same pair. of rolls, it is necessary to move the rolls vertically. Such adjustment is eifected by the upper setting while the rotation of the rolls is carried out about their vertical axes by a special hand-operated device. This operation involves however tedious adjustments which affect very considerably the expeditious performance of the work. In order to avoid these disadvantages it is proposed according to the present invention to transmit the movement of the setting motor not only for setting the upper roll but also for setting both rolls, in such manner that they are rotated about their vertical axes.

The construction of the apparatus according to the invention is illustrated by way of example in the accompanying diagrammatic drawings, in which:

Figure 1 is a front elevation of the apparatus,

Figure 2 is corresponding side elevation,

Figure 3 is a plan view corresponding to Figures 1 and 2, and

Figures Land 5 show different positions of the straightening rolls.

1927. Serial n. 199,380.

work. These rolls are adjusted vertically and horizontally according to the invention by means of a single motor 4 which is provided in known mannerupon the frame 1. Vertical setting is secured in known manner through the worm gearing 5, and according to the invention the rotary movement of the setting motor is transmitted through the screw gearing 6 to the shaft 7. The latter is connected in turn through the pair of bevel Wheels 8 to the vertically disposed shaft 9 so that this is driven at the same time. In the casings l0 and 11 pairs of bevel wheels are provided, the first pair of which act upon the screw threaded spindle 12 and the latter pair upon the screw threaded spindle 13. The casings 10 and 11 are provided in such a manner that the spindles 12-and 13 may partially revolve about the shaft 9. These two spindles are connected to the movable bearingsl t and 15 of the upper and lower 16 and 17 respectively, pivotally mounted to turn on vertical axes on the two bearings referred to. The bearings 14 and 15 are adjustably mounted in any known manner respectively upon the support 18 for the u per roll 2 and the base 19 of the mill. n this way a positive connection is made between the vertical and horizontal adjusting mechanism of the rolls so that in the vertical setting movement of the upper roll 2, the two spindles 12 and 13 are rotated at the same time. If, for example, the upper roll is lowered a distance, such that the space between the two rolls is reduced from 0: to (Figures 1, 2, 4 and 5), the inclined position of the two rolls 2 and 3 is at the same time s changed that the distance 3 in Figure 3 (or 1 in Figure 1) is reduced to '1 The rolls are rolls 2 and 3, the spindles'engaging in nuts adjusted in the horizontal position as will beseen from the drawings by the spindles 12 and 13 with the corresponding nuts 16 and 17. If, for example, tubes of greater diameter are to be straightened, the vertical distance between the two rolls 2 and 3 is made 00 whereby at the-same time the inclined position of the rolls with respect to each other is simultaneously changed, as indicated in Figure 5 to the distance y This distance follows from the angle or shown in Figure 3 which gives the inclination of the two rolls to one another.

I claim 1. Apparatus for adjusting the rolls of tube finishing or straightening rolling mills, the rolls of which are inclined to one another, comprising bearings for the said rolls which bearings are revolvable about an.axis normal to the axis of the pass of the said rolls and are relatively adjustable in the direction of the said normal axis, and mans for effecting the relative adjustment of the bearings and automatically and simultaneously revolving them in dependence upon said relative adjustment.

2. Apparatus for adjusting the rolls of tube finishing or straightening rolling mills, the rolls of which are inclined to one another, comprising bearings for the said rolls which bearings are revolvable about an axis normal to the axis of the pass of the said rolls and are relatively adjustable in the direction of the said normal axis, a motor, a motor shaft rotated by the said motor, gearing between the said shaft and the said bearings for efi'ecting the relative adjustment of the said bearings, and gearing between the said shaft and the said bearings for effecting a movement of revolution of the said bearings about the said normal axis in dependence upon said relative adjustment.

3. Apparatus for adjusting the rolls of tube finishing or straightening rolling mills, the rolls of which are inclined to "one another, comprising bearings for the said rolls which bearings are revolvable about an axis normal to the axis of the pass of the said rolls and are relatively adjustable in the direction of the said normal axis, a motor, a motor shaft rotated by the said motor, gearing between the said shaft and the said bearings for ef-- fecting the relative adjustment of the said bearings, a driven shaft parallel with the axis normal to the axis of the pass of the said rolls, gearing between the said driven shaft and the motor shaft, threaded spindles transversely disposed and revoluble with respect to the driven shaft, gearing connecting the said spindles with the said driven shaft, and nuts engaging the said threaded spindles and pivotally connected to the respective bearings of the said rolls, so that rotation of the driven shaft produces movement of the nuts in opposite directions.

HERMANN IDEL. 

